***** İş bu post peçeteye istek yazan :D diğer Çekirgem Engin 'im için yazılmıştır :)))
... Kavgacı pilice verilmiş olan söz doğrultusunda ıkına sıkına da olsa marketten üçlü paket Kinder süpriz alınmıştır. Ağaç yaşken eğilir denklemi ile yola çıkarak ve boş bulunduğu her an sıkmadan , çaktırmadan matematik, okuma vs. beyne itina ile işlenmektedir :))))
Anne MADA : Al bakalım söz verdiğim Kinder süprizin :(((
Mina ADA : Yasasssın :)))
Anne MADA : Hııım söyle bakalım çekirge , o pakette kaç tane çukulata var , say bakalım ?
Mina ADA : Birrr , İkiii , Üççç , üççç taneeeeee :D
Anne MADA : Aferin , peki 1 tanesini yersen kaç çukulatan kalır bakalım ADA 'cım ?
Mina ADA : İkii , lalala laalaaalaaaa …
Anne MADA : Aferin , peki ikisi yersen ne kalır ?
Mina ADA : Hiç , çöp kalır :))))))
Anne MADA : DUMURRRRRRRRRRRRRRRRRR ...
NOT: Peçeteye istek yazan çekirge tam oarak ben oluyorum :)))))
24 Ocak 2008 Perşembe
DUMUR DİALOG PART III
26 Eylül 2007 Çarşamba
23 Eylül 2007 Pazar
Meat Loaf - I'd Do Anything For Love
Bilen bilir anlatmaya gerek yok....
Yıl 1993, yine nostalji sardı dört bir yanımı :)
21 Eylül 2007 Cuma
28 Ağustos 2007 Salı
26 Ağustos 2007 Pazar
25 Ağustos 2007 Cumartesi
Robot walks on water
(Left) Photo of the water strider insect. (Right) Photo of the 1-gram robot on the surface of the water. A, B, C, D: supporting legs; E and F: actuating legs; G: body with on-board electronics and power source; H: middle actuator; I and J: right and left actuators. Image credit: Yun Seong Song and Metin Sitti. ©IEEE 2007.
Water striders, insects that walk on the surface of the water, may never set foot on land in their lives, and yet they’re not swimmers. Over the past million or so years, this insect—sometimes called a water skater—has optimized its use of surface tension to balance its 0.01-gram body on lakes, ponds, and even oceans.
Researchers Yun Seong Song, a PhD student in mechanical engineering, and Metin Sitti, assistant professor in mechanical engineering, both from Carnegie Mellon University, have recently built a robot that mimics the water strider’s natural abilities. The first water striding robot, with an appearance and design closely resembling its insect counterpart, doesn’t ever break the surface tension of the water, and is highly maneuverable.
Song and Sitti’s small robot is different from other floating robots in that its small mass and long legs enable it to utilize the surface tension force to stay afloat. In contrast, macroscale bodies must rely on buoyancy, which is based on their large volumes. The researchers predict that such a robot might be used for environmental monitoring via wireless communication, as well as for educational and entertainment purposes.
“Water strider robots—we call them STRIDEs (Surface Tension Robotic Insect Dynamic Explorer)—can walk on water only 3-4 mm deep (shallow water),” Sitti explained to PhysOrg.com. “Their power efficiency and agility (speed and maneuverability) are much superior for relatively small water vehicles since the STRIDE legs have much less drag than any buoyancy based robot.”
Of course, as Sitti explained, this advantage is eliminated when the STRIDE becomes meter-scale, since surface tension force scaling is not favorable at large scales.
From models and calculations, the researchers found that an optimal robot would have hydrophobic wire legs coated with Teflon, each 5 cm long. Twelve of these legs attached to the 1-gram body of the robot could support a payload of up to 9.3 grams in their experiments. The key to avoiding the breaking of the water surface is in maintaining a water-air interface that is more horizontal than vertical.
For locomotion, the water strider insect creates a sculling motion with specialized sculling legs. The robot functions the same way. Three piezoelectric actuators, when attached to the legs in a T shape, create both vertical and horizontal motion to cause the elliptical sculling motion required to move.
Because the piezoelectric actuators provided only a small deflection, an amplifier was needed to create large strokes. To achieve this, the researchers used a resonant frequency with a vibration mode favorable to generating the sculling motion to drive the actuators. While a water strider insect can move at speeds of up to 1.5 m/s, the first robot still achieved a forward speed of 3 cm/s, and could also turn, rotate and move backwards.
Currently, rough water may present a hazard to the robot striders. However, Sitti hoped that by improving the lift capability and water sealing of the current STRIDE, the robot would be able to withstand waves and storms.
Song and Sitti are working on other ways to improve the robot in future prototypes. For example, the T-shape actuator mechanism accounts for more than half the weight of the robot, which could possibly be hindering the robot’s speed.
In a more recent prototype, for instance, the researchers designed a STRIDE that used two battery-powered micromotors to walk on water. Although this set-up had an increased mass of 6 grams, the robot also achieved an increased speed of 8.7 cm/s. The group plans to continue experimenting with different options.
“STRIDE is 10-15 times slower than the insect, since the current prototype is almost 10 times larger than the insect,” Sitti explained. “Therefore, we would miniaturize the STRIDE more. Moreover, we are integrating wireless communication, sensors, and teleoperated and autonomous control capability to the new STRIDE prototypes. Thus, we could deploy tens or hundreds of these robots to the water surface for environment monitoring.”
Citation: Song, Yun Seong, and Sitti, Metin. “Surface-Tension-Driven Biologically Inspired Water Strider Robots: Theory and Experiments.” IEEE Transactions on Robotics, Vol. 23, No. 3, June 2007.
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ELECTRONIC DEVICES
24 Ağustos 2007 Cuma
ÖZEL yapım bir ıntruder
Marka: Suzuki
Model: VL 1400 Intruder
Tipi: Chopper / Cruiser
Motor Hacmi: 601 - üstü
Renk: Sarı
KM: 26000
Yıl: 1991
Durumu: İkinci El
23 Ağustos 2007 Perşembe
Where have all the dolphins gone?
Scientists ask: Where have all the dolphins gone? from PhysOrg.com
Sightings by marine scientists of dolphins in the north Atlantic's Bay of Biscay have dropped off by 80 percent compared to the same period in 2006, a wildlife conservation group said Wednesday.
[...]
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Etiketler:
Where have all the dolphins gone?
21 Ağustos 2007 Salı
SATILIK
FİYATI: 33.850 €
İlan Tarihi: 20-08-2007
Marka: Harley-Davidson
Model: Softail Custom FXSTC
Tipi: Chopper / Cruiser
Motor Hacmi: 601 - üstü
Silindir Sayısı: Çift Silindir
Renk: Çift Renk
KM: 0
Yıl: 1998
Durumu: İkinci El
Kimden: Sahibinden
Daha fazla ayrıntı, bilgi ve resim için TIKLAYINIZ.
14 Ağustos 2007 Salı
13 Ağustos 2007 Pazartesi
CHOPPER NEDİR?
Cogu yazilarda chopper ve cruiser tabirleri karistiriliyor, ve cruiser lara yanlislikla chopper deniyor.
Oysa ki bu altta gordukleriniz "Chopper" dir. Tamamen sahsa mahsus, ozel imalatlardir. Aynisindan dunyada iki tane yoktur.
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CHOPPER NEDİR?
12 Ağustos 2007 Pazar
(more...)Ferrari Formula One Team Racecar Chopper
It’s for sale over on ebay and they have a video showing it running around a bit. The music drowns out the sound of the bike, but what you do hear isn’t your normal chopper sound and it would probably run away from most choppers in a straight line, but I think I would slow way down for the turns. No F1 handling here! Different and interesting in its own way.
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Etiketler:
Ferrari F1 Style Chopper
OCC Bikes
Army Bike
Bass Pro Shops Bike
Black Widow Bike
CAT Bike
Dixie Chopper
FANtasy Bike 1
FANtasy Bike 2
FANtasy Bike 3
FANtasy Bike 4
Fire Bike
Gillette Bike
Green Web Bike
I, Robot Bike
Jet Bike
Lance Armstrong Chopper
Liberty Chopper
Napa Drag Bike
NASA Bike
New York Jets Chopper
Police Bike
POW MIA Bike
Snap-On Bike
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American Chopper
